No moat. Still in business.
Software directory for those who don’t want to rebuild, own the updates, the bugs, the support.
- Callosum
Desktop app for designing, calling and documenting APIs that keeps an OpenAPI spec in sync, offline with no login.
Since 2024
Free trial · Developer tools · Developers
- Voiden
An offline desktop app for designing, testing and documenting APIs as Markdown files kept in your Git repo.
Since 2025
Developer tools · Developers
- Echolon
Open-source API client that keeps collections as local files synced through Git, for testing REST and WebSocket APIs offline.
Free plan · Developer tools · Developers
- Yaak
A desktop app for sending and testing REST, GraphQL, gRPC and WebSocket requests, stored locally and synced through Git.
Since 2025
Subscription · Developer tools · Developers
- GiantJSON Viewer+
Android app that opens multi-gigabyte JSON, CBOR and MsgPack files, analyses HAR logs and sends API requests, all offline.
Since 2026
Developer tools · Developers
- Hoppscotch
Build, test and share API requests with your team in shared workspaces, on the hosted cloud or your own servers.
Developer tools · Developers
- Apicat
Offline API testing app that saves requests as .http files you can keep in Git, and imports Postman collections.
Since 2025
Free · Developer tools · Developers
- Kreya
Desktop app for calling and testing gRPC, REST, GraphQL and WebSocket APIs, storing requests as files in Git.
Since 2022
Free plan · Developer tools · Developers
- Bruno
An offline API client that saves request collections as plain text in your repo so teams can share them through Git.
Free · Developer tools · Developers